The quantitation of how much time constitutes short and recent varies by disease and by context, but the core denotation of acute is always qualitatively in contrast with chronic, which denotes long-lasting disease (for example, in acute leukemia and chronic leukemia).
View full size image. Thomas Edison is usually credited with the invention of the light bulb, but the famous American inventor wasn't the only one who contributed to the development of this revolutionary technology.
1850 Joseph W. Swan began working on a light bulb using carbonized paper filaments. 1860 Swan obtained a UK patent covering a partial vacuum, carbon filament incandescent lamp. 1877 Edward Weston forms Weston Dynamo Machine Company, in Newark, New Jersey.